.goods-img-box {
    position: relative;
}

.small-img {
    width: 450px;
    height: 450px;
}

.small-img img {
    width: 100%;
    height: 100%;
}

.focus {
    width: 300px;
    height: 300px;
    background: #badef7;
    opacity: 0.5;
    position: absolute;
    left: 0;
    top: 0;
    display: none;
}

.big-img {
    position: absolute;
    left: 470px;
    top: 0px;
    width: 500px;
    height: 500px;
    overflow: hidden;
    display: none;
    z-index: 99;
    // border: 1px solid #000;
}

.big-img img {
    position: absolute;
    left: 0;
    top: 0;
    width: 750px;
    height: 750px;
    z-index: 99;
}